Digital Commons Network^™

Nf94-168 Listeria Monocytogenes, Susan S. Sumner, Julie A. Albrecht

University of Nebraska-Lincoln Extension: Historical Materials

This NebFact discusses Listeria monocytogenes bacteria.

Nf94-166 Aeromonas Hydrophilia, Susan S. Sumner, Julie A. Albrecht

University of Nebraska-Lincoln Extension: Historical Materials

This NebFact discusses Aeromonas hydrophilia bacteria.

Research And Extension Needs For Integrated Pest Management For Arthropods Of Veterinary Importance, Christopher J. Geden, Jerome Hogsette

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

In April, 1994, a workshop was held in Lincoln, Nebraska, to update the IPM document that resulted from a similar workshop in Manhattan, Kansas, in 1979 (Anonymous 1979). The workshop was initiated by Dr. Ralph A. Bram, USDA National Program Leader, and organized by Drs. Gustav D. Thomas, USDA-ARS, Lincoln, and John B. Campbell, University of Nebraska, North Platte. Participants were charged with assessing the current status of IPM programs for pests of veterinary importance, identifying needs for program improvements, and recommending future research and extension priorities. Participants, invited from federal and state government research and extension organizations, and the …

Haemophilus Parainfluenzae Endocarditis: Application Of A Molecular Approach For Identification Of Pathogenic Bacterial Species, Kamal A. Hamed, Philip R. Dormitzer, Catherine K. Su, David A. Relman

United States Department of Veterans Affairs: Publications

Haemophilus parainfluenzae is both a human oropharyngeal commensal bacterium and a cause of serious invasive disease. The fastidious growth characteristics of this organism and the poor specificity of traditional methods for species identification are likely to have led to inaccuracies in the diagnosis of infections caused by H. parainfluenzae and related organisms. We report a case of H. parainfluenzae endocarditis in which confusion related to microbial identification was resolved by the analysis of 16S ribosomal RNA sequences. Rapid identification was facilitated by amplification of 16S ribosomal DNA directly from cultured cells with use of the polymerase chain reaction …

Extension And Education Materials For Sustainable Agriculture, Volume 2, James W. King, Charles A. Francis

CARI Extension and Education Materials for Sustainable Agriculture

Extension and Education Materials for Sustainable Agriculture

Curricula in Sustainable Agriculture

Introduction to Curricula in Sustainable Agriculture

Sustainable Agriculture, Agronomy 493/593 Course Outline

Sustainable Agriculture, Agronomy 493/AG*SAT

Principles and Practices of Sustainable Agriculture

Agricultural Ecosystems

Agricultural Ecology

Agroecology

Agricultural Ecology and Sustainability

Alternative Agriculture Curriculum

Sustainable Agriculture (B.S.)

Environment and World Food Production

Issues (Advanced) in Sustainable Agriculture

Crops, Soil, and Civilization, Agronomy 440

Master of Science in Sustainable Systems

Agricultural Ecology

National Curriculum for Sustainable Agriculture

Reshaping Undergraduate and Graduate Education to Include a Whole Systems Emphasis

Sustainable Agriculture Education: A Panel

Impact of Sustainable Agriculture Programs on United.States …

1994 Beef Cattle Report, Darrell W. Nelson

Nebraska Beef Cattle Reports

Two grazing trials were conducted to determine i/protein or energy was first limiting in the spring-and fall-born nursing calf grazing native sandhills range. Spring-born calves supplemented with escape protein gained more rapidly than calves supplemented with energy or nonsupplemented controls. Fall-born calves supplemented with escape protein gained more rapidly than those supplemented with rumen degradable protein or energy and nonsupplemented controls early in the trial, but gained at a similar rate to the energy controls by the end of the trial. Milk intake was similar across treatments for both trials. Escape protein is more limiting in the young nursing calf …

Colony Isolation And Secondary Culture Of Fetal Porcine Hepatocytes On Sto Feeder Cells, Neil C. Talbot, Vernon G. Pursel, Caird E. Rexroad Jr., Thomas J. Caperna, Anne M. Powell, Roger T. Stone

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The secondary culture of non-transformed parenchymal hepatocytes has not been possible. STO feeder cell-dependent secondary cultures of fetal pig hepatocytes were established by colony isolation from primary cultures of 26-d fetal livers. The liver cells had the typical polygonal morphology of parenchymal hepatocytes. They also spontaneously differentiated to form small biliary canaliculi between individual cells or progressed further to large multicellular duct-like structures or cells undergoing gross lipid accumulation and secretion. The secondary hepatocyte cultures expressed alpha-fetoprotein (AFP), albumin, and β-fibrinogen mRNA, and conditioned medium from the cells contained elevated levels of transferrin and albumin. STO feeder cell co-culture may …

Purification Of The Major Soybean Leaf Acid Phosphatase That 1s Increased By Seed-Pod Removal, Paul E. Staswick, Chuck Papa, Jing-Feng Huang, Yoon Rhee

Department of Agronomy and Horticulture: Faculty Publications

Fruit removal for 5 weeks after flowering increased acid phosphatase activity 10-fold in soybean (Glycine max 1. Merr. vai Hobbit) leaves compared with normal seed-pod-bearing plants. The major acid phosphatase activity in leaves was purified over 2700-fold, yielding a single polypeptide of 51 kD with a specific activity of 1353 units/mg protein using p-nitrophenylphosphate as the substrate. lsoelectric focusing demonstrated that the purified protein co-migrated with a majority of the activity that increased in leaves following seed-pod removal. lmmunoblot analysis demonstrated that at least part of the increased activity was dueto an increased abundance of the phosphatase protein. In situ …

Exopeptidase Catalyzed Site-Specific Bonding Of Supports, Labels And Bioactive Agents To Proteins, Fred W. Wagner, Thomas R. Coolidge, Dwane E. Wylie, Sheldon M. Schuster, William Lewis, Jay Stout

Department of Biochemistry: Faculty Publications

The invention provides a means for attaching a label, support or bioactive agent to a protein with an exopeptidase at a site that is remote from the active site of the protein. More specifically the invention is directed to a method for the attachment of an amino acid, amine and alcohol nucleophile to the carboxyl terminus of a protein. In one embodiment, a labeled nucleophile is attached to a protein such as an antibody. In other embodiments, the invention is directed to a method for the attachment of a protein to an immobilization support and to a method for the …

Experimental Evidence For Insect Impact On Populations Of Short-Lived, Perennial Plants, And Its Application In Restoration Ecology, Svata M. Louda

School of Biological Sciences: Faculty Publications

Successful management of vegetation and the restoration of threatened or endangered plant populations clearly depend on the unambiguous identification of the factors that determine and limit plant abundance and distribution (e.g. Harper 1977, Jordan, Gilpin & Aber 1987). Physical conditions, plant physiological responses, and plant competitive interactions are often important (e.g. Harper 1977, Chabot & Mooney 1985, Pickett & White 1985, Grace & Tilman 1990), and these factors are usually evaluated. However, trophic interactions, such as those involving plant consumption by insects and pathogens, may also be critical in the growth, reproduction, and population dynamics of native plants (e.g. Harper …

Otitis Media, Mastoiditis, And Infracranial Lesions In Two Plains Indian Children, Robert W. Mann, Douglas W. Owsley, Karl J. Reinhard

Karl Reinhard Publications

One disease condition that is common to nearly all children is otitis media, also known as middle ear disease. Although most people speak of it as a middle ear "infection," other causes such as neoplasm (tumor) can result in manifestations and symptoms mimicking an infectious process. This paper presents findings related to osseous lesions in two Indian children, approximately three to five years of age, who died with otitis media and infracranial lesions. Through macroscopic and radiographic analysis, it is possible to show that one child probably suffered from tuberculosis and the other from histiocytosis X. From an epidemiological and …

Trade, Contact, And Female Health In Northeast Nebraska, Karl Reinhard, Larry Tieszen, Karin L. Sandness, Lynae M. Beiningen, Elizabeth Miller, A. Mohammad Ghazi, Christiana E. Miewald, Sandra V. Barnum

Karl Reinhard Publications

Most scholars are understandably preoccupied with the impact of Europeans on native peoples who were passive, unwilling, or resistant participants in that contact. We present in this chapter a different case. The Missouri River tribes, including the Omaha and Ponca, willingly engaged in relations with Euramericans, especially in the fur trade that dominated interaction in this region. The time frame for this study is 1780- 1820, a period when interaction between individual traders and Native Americans was replaced by the dominance of the American Fur Company in organized exploitation of the Missouri River lands and peoples. This involvement later contributed …

A Continuous Culture Of Pluripotent Fetal Hepatocytes Derived From The 8-Day Epiblast Of The Pig, Neil C. Talbot, Caird E. Rexroad Jr., Anne M. Powell, Vernon G. Pursel, Thomas J. Caperna, Sherry L. Ogg, Neil D. Nel

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Continuous cultures of pluripotent prenchymal hepatocytes were derived from the epiblasts of 8-day-old pig blastocytes. The cells were polygonal and had phase-contrast dark, granular cytoplasm with prominent nuclei and nucleoli. These feeder-dependent cell cultures differentiated into large, multicellular, secretory, duct-like structures or formed small canaliculi between individual cells. Alternatively, the cells accumulated droplets that stained intensely with Oil Red O, a lipid-specific stain. Alpha-fetoprotein (AFP), albumin, and β-fibrinogen mRNAs were expressed as the cells differentiated in culture. Serum-free medium that was conditioned by the cells contained transferrin, AFP, and albumin. The growth and viability of the cells were inhibited by …

Life History Of Immature Maize Weevils (Coleoptera: Curculionidae) On Corn Stored At Constant Temperatures And Relative Humidities In The Laboratorv, James E. Throne

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Life history of immature maize weevils, Sitophilus zeamais Motschulsky, was studied at 10-40°C and 43-76% RH. The optimal quantity of corn for minimizing density effects and the optimal observation frequency for minimizing disturbance effects were determined at 30°C and 75% RH. The quantity of corn (32-256 g) provided to five females ovipositing for 24 h did not affect duration of development, but the number of progeny produced increased asymptotically as the quantity of corn provided increased. Frequency of observation (from 1- to 14-d intervals) did not affect duration of development or number of progeny produced. Using moisture contents measured in …

Gamma Sigma Delta, Nebraska Chapter Newsletter, February 1994

Gamma Sigma Delta, Nebraska Chapter: Newsletters

PRESIDENT'S MESSAGE February 1994 - Dale H. Vanderholm, President, Nebraska Chapter

AT THE INTERNATIONAL LEVEL - Earl F. Ellington

NEWS FROM THE HISTORIAN - Charles H. Adams

Initiation and Awards Banquet Honored Recipients November 21, 1993

GAMMA SIGMA DELTA ACTIVITIES

GAMMA SIGMA DELTA BALFOUR PRICE LIST KEY AND PIN ORDERING INFORMATION 1994

GAMMA SIGMA DELTA 1994 COMMITTEES

Rejex-It'" Ag-36 The Gentle Way To Repel Geese From Golf Courses And Other Turf Areas, Peter F. Vogt

Great Plains Wildlife Damage Control Workshop Proceedings

Birds have always been a problem in agriculture, specially for berries and fruits. Farmers and home owners have been fighting these problems with limited success for centuries. However, the problems with birds on turf are relatively new and are not even known by many people. The "Complete Guide to Pest Control" (Ware 1988) does not even mention geese as a pest, or golf courses as an area of bird problems.

A Simple Basic Explanation Of Cow Nutrition, Ivan G. Rush

Range Beef Cow Symposium

Cattle producers in many ways have expertise in nutrition. Each day when cattle are fed or when grazing, they are taking in nutrients (protein, energy, minerals, etc.) that are vital for their life and production. Cattlemen are responsible for providing the feeds that supply the nutrients for the beef animal. If provided in the proper balance and portions at an economical level then the desired results should be obtained. If shortages occur with any required nutrient or if the nutrients are fed in excess or the sources are extremely costly then economic losses will be experienced. Because the largest cost …

Setting Direction And Effective Management Style, Burke Teichert

Range Beef Cow Symposium

Management style is a major determinant of effectiveness. Setting direction in turn is an integral part of an effective management style. At Rex Ranch our mission or long term direction is to "maximize long term profit while improving the land, animal and human resources." The redundancy in the mission statement is recognized and intended. If we fail to improve the land, animal and human resources, we will not be competitive or profitable in the long run. So, that part of the statement is to keep us based on correct principles.

A ranch is really a production and marketing system made …

Composite Breeds - What Does The Research Tell Us?, Keith Gregory, Larry V. Cundiff, R. M. Koch

Range Beef Cow Symposium

Heterosis achieved through continuous crossbreeding can be used to increase weight of calf weaned per cow exposed to breeding by 20%. Comprehensive programs of breed characterization have revealed large differences among breeds for most bioeconomic traits. About 55% of the U.S. beef breeding population involving 93% of the farmers and ranchers who produce beef cattle are in production units of 100 or fewer cows. Optimum crossbreeding systems are not easy to adapt in herds that use fewer than four bulls. Further, fluctuation in breed composition between generations in rotational crossbreeding systems can result in considerable variation among both cows and …

Effects Of Supplementation On Intake And Utilization On Harvested Forages, David W. Sanson

Range Beef Cow Symposium

A frequent question asked by beef cattle producers is what supplement should be used. Prior to asking this question, it should be determined if a supplement is necessary. To answer this question, the nutrient requirements of the animal to meet the desired production level must be established. Next, it should be determined if current feed resources will meet these needs. It may be possible to shift grazing practices or to adjust feeding levels and meet the requirements. Once it is established that a supplement must be used, then the supplement that will improve the utilization of the base diet should …

Precalving Nutrition/Birth Weight Interaction And Rebreeding Efficiency, Robert P. Wettemann

Range Beef Cow Symposium

Profitability of calf production can be greatly increased by improvements in reproductive efficiency. Losses in income are associated with nonpregnant cows, calves that are born late in the calving season and death of calves at birth. Too many heifers and cows exposed to bulls during a breeding season do not become pregnant and wean a calf the next year. A major reason for the inefficiency is that cows are not pregnant at the end of breeding because many have not been in estrus and bred by the bulls. In addition, some cows do not start estrous cycles until late in …

Calf Scours: Prevention And Treatment, Franklyn Garry

Range Beef Cow Symposium

There are numerous causes of disease and death in nursing beef calves. Within the first several days of life, the leading causes of beef calf disease are metabolic and behavioral problems, many of which are the direct or indirect result of dystocia. Thereafter, the most common calfhood problems are infectious diseases. Infections of the respiratory and gastrointestinal system account for the overwhelming majority of calf disease and death in the United States. Gastrointestinal diseases tend to be most common within the first month of life, while the respiratory diseases tend to be more important after that time.

There are numerous …

Cattle Abortions - Causes And Prevention, Michael Yaeger

Range Beef Cow Symposium

Abortions in cattle may result from a broad range of causes. Abortions may be idiopathic (occurring without known cause) or the result of metabolic or hormonal abnormalities, nutritional deficiencies, trauma, toxicities, or infectious processes. For this presentation, information collected from diagnostic laboratories in South Dakota, Nebraska and Wyoming has been summarized in order to distill this broad subject down to its most important aspects. This presentation will examine the various infectious causes of abortion and focus on those diseases which diagnostic results indicate are the most important contagious causes of abortion.

Before beginning the discussion of specific causes of abortion, …

Estrous Synchronization In Lactating Cows, Doug L. Hixon

Range Beef Cow Symposium

The objective of any successful synchronization program is to manipulate the estrous cycle of normally cycling females so that a large percentage will exhibit estrus with normal fertility at a pre-determined time. Synchronization programs have typically been most successful with heifers due to a lack of interference from extraneous factors. Since minimum age and weight are the primary prerequisites for a heifer of a particular breed to reach puberty, a nutritional program can be designed to allow the majority of heifers to reach their appropriate target weight by 13-14 months of age. Provided there are no health problems, or extreme …

Factors Affecting Calving Difficulty, R. A. Bellows

Range Beef Cow Symposium

Calf deaths resulting from difficult calving (dystocia) cause a major reduction in the net calf crop and income realized by beef producers. Based on 1993 projected figures, a 5% increase in animals available for sale in the U.S. could potentially increase gross receipts by over $1.5 billion annually. These same projection figures also suggest that losses attributed to calf deaths from dystocia alone exceed $750 million annually. Identifying ways to decrease dystocia and the accompanying calf deaths is the subject of this paper.

Effects Of Early Weaning On High Growth Calves And Subsequent Carcass Characteristics, R. H. Pritchard

Range Beef Cow Symposium

Historically, early weaning has been considered one of those things you might have to do in drought years. We do it because the cow-calf pairs are not realizing their production potential when running on dried up rangeland. For the rancher that has invested in quality bulls and is producing high growth potential calves, the problem is the same, only the circumstances are different. In years when grass production is adequate, high growth potential calves are not receiving adequate nutrition to express their genetic potential. The typical management adjustment in this situation is to creep feed or pre-condition the calves. Either …

Status Of Selected Fishes In The Missouri River In Nebraska With Recommendations For Their Recovery, Larry W. Hesse, Gerald E. Mestl, John W. Robinson

Nebraska Game and Parks Commission: Staff Research Publications

Population density of five species of chubs and two species of minnows in the Missouri River in Nebraska has been reduced by as much as 95% since 1971. Burbot have been nearly extirpated, sauger have been greatly reduced, and blue catfish are rare. Reasons for the decline of these species include removal of snags from the river; cessation of organic matter and sediment transport because of the construction of large dams on the mainstem and tributaries; cutoff of floodplain connection through channelization, degradation, and the cessation of flooding; alteration of the natural hydrograph to meet the need for commercial navigation; …

Nebline, December 1993

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Horticulture

Rural $ense

Human Resources

4-H & Youth

Environmental Focus

Community & Leadership Development

Extension Calendar

Expanded Food and Nutrition Education Program (EFNEP)

Nebraska Association for Family and Community Education News

and other extension news and events

Ard News December 1993

Agricultural Research Division: News and Annual Reports

CONTENTS:

SEASON'S GREETINGS
GRADUATE STUDENT ENROLLMENT FOR 1993-1994
ARD ADMINISTERED GRANT AND AWARDS PROGRAMS
INDIRECT COST RECOVERY BY ARD UNITS DURING FY 1993
NEW OR REVISED PROJECTS
PROPOSALS SUBMITTED FOR FEDERAL GRANTS
GRANTS AND CONTRACTS RECEIVED OCTOBER AND NOVEMBER, 1993
IANR RESEARCH TRAVEL FUND PROGRAM
CHEMICAL SAFETY/HAZARDOUS MATERIALS ISSUES
ARDC RESEARCH AND OUTREACH FACILITY
ARDC UPDATE

Wpa News 42 (1993), World Pheasant Association

Galliformes Specialist Group and Affiliated Societies: Newsletters

WPA News (November 1993), number 42

Published by the World Pheasant Association